/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraVersionedObject.h
Disables versioning and keeps only the data from the given version guid. Note that this breaks ALL references from existing assets and should only be used when creating a copy of an object, as the effect is very destructive.
virtual void DisableVersioning ( const [FGuid](API\Runtime\Core\Misc\FGuid) & VersionGuidToUse )